Definition: You are given a question on prehistory. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: Tiwanaku, with its capital at Titicaca, was one of the ___________ kingdoms of the ancient world.
(A)richest (B)strongest (C)largest (D)highest

D